package Capitulo02;

class X{
	void do1(){}
}

class Y extends X{
	void do2(){}
}

class Chrome {
	public static void main(String[] args) {
		X x1 = new X();
		X x2 = new Y();
		Y y1 = new Y();
		
		( (Y) x2 ).do2();
	}
}
